Do not normalize closure signature when building FnOnce shim
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Some changes occurred in compiler/rustc_codegen_cranelift cc @bjorn3 Some changes occurred to the CTFE / Miri engine cc @rust-lang/miri |
compiler-errors
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Jan 19, 2024
| assert_eq!(sig.inputs().len(), 1); | ||
| let args = tcx.mk_args_trait(self_ty, [sig.inputs()[0].into()]); | ||
| let tupled_inputs_ty = args.as_closure().sig().map_bound(|sig| sig.inputs()[0]); | ||
| let tupled_inputs_ty = tcx.instantiate_bound_regions_with_erased(tupled_inputs_ty); |
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If the types need normalization after monomorphization, then codegen will deal with this already.
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☔ The latest upstream changes (presumably #120196) made this pull request unmergeable. Please resolve the merge conflicts. |
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…yUwU Do not normalize closure signature when building `FnOnce` shim It is not necessary to normalize the closure signature when building an `FnOnce` shim for an `Fn`/`FnMut` closure. That closure shim is just calling `FnMut::call_mut(&mut self)` anyways. It's also somewhat sketchy that we were ever doing this to begin with, since we're normalizing with a `ParamEnv::reveal_all()` param-env, which is definitely not right with possibly polymorphic substs. This cuts out a tiny bit of unnecessary work in `Instance::resolve` and simplifies the signature because now we can unconditionally return an `Instance`.
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Rollup of 12 pull requests Successful merges: - rust-lang#112806 (Small code improvements in `collect_intra_doc_links.rs`) - rust-lang#119460 (coverage: Never emit improperly-ordered coverage regions) - rust-lang#119766 (Split tait and impl trait in assoc items logic) - rust-lang#120062 (llvm: change data layout bug to an error and make it trigger more) - rust-lang#120099 (linker: Refactor library linking methods in `trait Linker`) - rust-lang#120139 (Do not normalize closure signature when building `FnOnce` shim) - rust-lang#120160 (Manually implement derived `NonZero` traits.) - rust-lang#120171 (Fix assume and assert in jump threading) - rust-lang#120183 (Add `#[coverage(off)]` to closures introduced by `#[test]` and `#[bench]`) - rust-lang#120195 (add several resolution test cases) - rust-lang#120259 (Split Diagnostics for Uncommon Codepoints: Add List to Display Characters Involved) - rust-lang#120261 (Provide structured suggestion to use trait objects in some cases of `if` arm type divergence) r? `@ghost` `@rustbot` modify labels: rollup
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Rollup of 9 pull requests Successful merges: - rust-lang#112806 (Small code improvements in `collect_intra_doc_links.rs`) - rust-lang#119766 (Split tait and impl trait in assoc items logic) - rust-lang#120139 (Do not normalize closure signature when building `FnOnce` shim) - rust-lang#120160 (Manually implement derived `NonZero` traits.) - rust-lang#120171 (Fix assume and assert in jump threading) - rust-lang#120183 (Add `#[coverage(off)]` to closures introduced by `#[test]` and `#[bench]`) - rust-lang#120195 (add several resolution test cases) - rust-lang#120259 (Split Diagnostics for Uncommon Codepoints: Add List to Display Characters Involved) - rust-lang#120261 (Provide structured suggestion to use trait objects in some cases of `if` arm type divergence) r? `@ghost` `@rustbot` modify labels: rollup
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Rollup merge of rust-lang#120139 - compiler-errors:fnonce-shim, r=BoxyUwU Do not normalize closure signature when building `FnOnce` shim It is not necessary to normalize the closure signature when building an `FnOnce` shim for an `Fn`/`FnMut` closure. That closure shim is just calling `FnMut::call_mut(&mut self)` anyways. It's also somewhat sketchy that we were ever doing this to begin with, since we're normalizing with a `ParamEnv::reveal_all()` param-env, which is definitely not right with possibly polymorphic substs. This cuts out a tiny bit of unnecessary work in `Instance::resolve` and simplifies the signature because now we can unconditionally return an `Instance`.
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It is not necessary to normalize the closure signature when building an
FnOnceshim for anFn/FnMutclosure. That closure shim is just callingFnMut::call_mut(&mut self)anyways.It's also somewhat sketchy that we were ever doing this to begin with, since we're normalizing with a
ParamEnv::reveal_all()param-env, which is definitely not right with possibly polymorphic substs.This cuts out a tiny bit of unnecessary work in
Instance::resolveand simplifies the signature because now we can unconditionally return anInstance.